CLIF Bloks Energy Chews
CLIF Bloks are the default because they are easy to buy, easy to portion, and familiar to many runners.
Runners who want simple carb math, broad flavor availability, and an easy-to-find chew.
You dislike firm chews or find chewing hard at race effort.
The recurring caution is chewing and breathing at faster efforts.
Current model with strong recent evidence.
View full evidence Upside, cautions, and proof
Runner discussion often treats Bloks as a reliable chew baseline.
The recurring caution is chewing and breathing at faster efforts.